1-Wire

Contents

One Wire

1-Wire is a device communications bus system designed by Dallas Semiconductor that provides low-speed data, signaling, and power over a single signal. 1-Wire is similar in concept to I²C, but with lower data rates and longer range. It is typically used to communicate with small inexpensive devices such as digital thermometers and weather instruments. A network of 1-Wire devices with an associated master device is called a MicroLan.

1-Wire support for Mainline kernel

To communicate with 1-wire devices it is recommended to use w1-gpio driver as most of the Allwinner SoCs lack hardware controller (only present on A31 and A80).